About 120 miles an hour falling flat like a sky diver before pulling the rip cord.
You could go faster by diving straight down, but before long the "Munk Moment" is likely to turn you belly down. An elongated body in a stream is basically unstable with the pointy end forward and tends to turn sideways. If you draw such an object at a slight angle to straight ahead and approximate potential streamlines around it, you get stagnation points (maximum pressure ) at bow and stern so as to turn the bow away from the flow, and you end up going with your long axis perpendicular to the flow (belly down)

A 21000 kilogram car starts from rest at the top of a 5.0 meters long driveway that is inclined at 20 degrees with the horizontal. If the friction force of 40000 impedes the ,motion find the speed of the car at the bottom of the driveway

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